Gas-engine.



PATENTED MAR, 8, 1904. H. RICHTER.

GAS ENGINE.

APPLICATION FILED JULY 9, 1903.

N0 MODEL.

W/TNCGGES Ens ctr. wuoruum Patented March 8, 1904.

PATENT OFFICE.

HANS RICHTER, OF NUREMBERG, GERMANY.

GAS-ENGINE.

SPECIFICATION forming part of Letters Patent No. 754,163, dated March 8,1904.

' Application filed July 9, 1903. Serial No. 164,865. (No model.) I

To all whom it may concern:

Be it known that I, HANS RICHTER, engineer, a subject of the GermanEmperor, residing at Nuremberg, in the Empire of Germany,

(whose full postal address is 15 Gleisbuhlstrasse, Nuremberg,aforesaid,) have invented certain new and useful Improvements in andConnected with Gas-Engines, of which the fol lowing is a specification.

As it has been found very expensive to thoroughly clean blast-furnacegases which are intended to be employed for feeding large gas-engines,so that no solid residuals can be deposited in the interior of thecylinders, it appears preferable to renounce such a careful cleansing ofthe gas and instead to arrange for the necessity of frequently cleaningthe interior of the cylinders. Now in order that this cleaning shall notentail too great a loss of time the whole arrangement of the gas-enginemust be such that as few parts as possible have to be unfastened ortaken down and more particularly the use of a crane dispensed with whenit is desired to render the interior of the cylinder accessible and towithdraw the piston. While the latter in single-acting cylinders opentoward the crank-shaft and may be drawn without further trouble, wheredoubleacting cylinders are employed-that is to say, cylinders closed atboth ends-a new arrangement of the cross-head slideways and thecylinder-covers is necessary, which new arrangement forms the object ofthe present invention.

In the accompanying drawings 'a gas-engine is shown in which theinterior of the cylinder is made accessible in this manner, Figure 1being a vertical cross-section. Fig. 2 shows another sectional view withthe cylinder-Cover removed, and Fig. 3 a view with the piston run out.

A double-acting cylinder at, in which apiston 6 travels, is closed atthe front end by a cover 0 and at the rear end by a cover d.'

The round openings, which may be exposed by the removal of these covers0 and d, have a larger diameter than the piston I). The

latter is carried by a piston-rod 6, running right through, which iscarried to the outside through both covers 0 and d and is tight-washeredby means of stufiing-boxes f and g. The two ends of the continuouspiston-rode are in firm but removable connection with the frontcross-head h and the rear cross-head c. The connecting-rod j fortransmitting the movement to the crank-shaft k is linked to the formercross-head. The cross-heads k and c slide on guides or hearing land we.The slideway Z lies lower than the cover a, and the same exactly appliesfor the slideway m and the cover (Z. When the interior of the cylindersis to be cleaned, more particularly at the front end of the cylinder,the crank is turned to the front dead-point and then the frontcylinder-cover d screwed off and pushed along the piston-rod c, Fig. 2;The rear cylinderchamber may then be made accessible in a similarmanner. In case also the piston itself is to be withdrawn the connectionbetween the cross-heads and the piston-rod is released, and then thepiston is drawn out through the front or rear cylinder-aperture,preferably the latter, because of avoiding the necessity of dismountingthe connecting-rod.

Of course another arrangement may be adopted by which the connectionbetween piston I; and piston-rod 6 may be released from the outside, andconsequently the piston may be drawn along the piston-rod withoutreleasing the connection between the cross-heads and the piston-rod,Fig. 3.

= Having now particularly described and ascertained the nature of thesaid invention and in what manner the same is to be performed ascommunicated to me by my foreign correspondents, I declare that what Iclaim is In a double-acting four-stroke gas-engine, a base, a cylindermounted thereon, a removable cylinder-head at each end, a pistonrodprojecting through each cylinder-head, a piston carried by said rod, anda cross-head connected to the rod at each end and having a slidingconnection with the base below the bottom of the cylinder, substantiallyas decribed.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

HANS RICHTER.

Witnesses:

MARTIN OFFENBACHER, OSCAR BooK.

